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Re: VRFs on ASBRs with inter-AS VPNs[sic]

  • From: "Krzysztof Szarkowicz" <kszarkowicz@freemail.hu>
  • Date: Fri, 15 Mar 2002 14:35:35 +0100
  • Cc: "Mpls-Ops \(E-mail\)" <mpls-ops@mplsrc.com>
  • Resent-Date: Fri, 15 Mar 2002 09:47:52 -0500
  • To: <raszuk@cisco.com>
  • X-MIME-Autoconverted: from quoted-printable to 8bit by host.secure4-hosting.net id g2FDZk422009
  • X-OriginalArrivalTime: 15 Mar 2002 13:35:37.0689 (UTC) FILETIME=[4AAEFC90:01C1CC26]
  • X-Originating-IP: [212.222.244.14]


----- Original Message ----- 
From: "Robert Raszuk" <raszuk@cisco.com>
To: "Roumen Doukov" <rdoukov@orchestream.com>
Sent: Wednesday, March 06, 2002 4:01 PM
Subject: Re: VRFs on ASBRs with inter-AS VPNs[sic]


(...)
> 
> The dummy vrfs Morgan has noticed on ASBR or vpnv4 RR is nothing else
> then screwed examples and confusion to customers. We never required them
> !!! So just forget about it and go on to look for better samples of
> configuration :). 
> 
(...)
> How to control the amount of vpnv4 routes on Inter-AS ASBR -> 
> 
> (the worst you can do is to play with dummy vrfs !!!) 
> 
> Recommendations:
> 
> A) Have a special single bgp community for exportable to inter-as peer
> vpnv4 routes - you set the filter once on ASBR and done. 
> 
> B) Do the bgp inbound filetering on receved bgp vpnv4 routes
> 


Could you elaborate more why community filtering is better that RT filtering caused by dummy vrfs on ASBR?


Krzysztof

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